Should you build your own Sync.com?
Back up and share selected folders with client-side encryption and versioning
A consolation build is possible, but the paid product's decisive value sits outside a solo rebuild. For Sync.com, back up and share selected folders with client-side encryption and versioning. The hard boundary is zero-knowledge architecture, mature sync clients, sharing controls, and support, plus reliability, durability, and cross-device sync.
ENOriginal research content in English. Original prompt preserved in English.
Build a closest honest personal substitute for Sync.com in an empty repository.
Use Next.js 15, TypeScript, PostgreSQL, MinIO, and a Tauri 2 sync client; do not offer alternative stacks.
The core loop is: back up and share selected folders, encrypt files client-side, track versions, and restore them from user-owned object storage.
Make the first run work locally with one documented command.
Store all user data locally by default and make export straightforward.
Put secrets in .env, ship .env.example, and never commit credentials.
Build a desktop client that watches explicitly selected folders and ignores configured patterns.
Chunk, hash, compress, and encrypt files locally before uploading to the configured object store.
Store version metadata, tombstones, device identifiers, and integrity checks in PostgreSQL.
Provide upload and restore queues with pause, retry, bandwidth limits, and resumable transfers.
Add file history, point-in-time restore, key export, storage usage, and scheduled restore tests.
Document the failure model and make clear that one server is not a complete backup strategy.
Include clear empty, loading, success, and recoverable error states.
Add input validation, safe filenames, and graceful handling of unavailable APIs.
Write focused tests for the core transformation and one end-to-end happy path.
Create a README with setup, architecture, permissions, data location, and backup steps.
Do not add accounts, billing, telemetry, analytics, or a hosted control plane.
Do not claim to reproduce proprietary data, network liquidity, regulated access, or frontier infrastructure.
Deliberately leave out multi-provider consumer sync at global scale.
Deliberately leave out guaranteed durability or ransomware recovery.
Deliberately leave out shared-drive administration, mobile apps, and enterprise compliance.
Finish by running the tests and listing the exact commands used.The prompt opens pre-filled in your agent. Review it before running. · this prompt is generated from the build plan · improve it via PR
What would building your own look like?
Back up and share selected folders, encrypt files client-side, track versions, and restore them from user-owned object storage.
What you will need
- user-owned server or S3-compatible bucket
- PostgreSQL
- MinIO or object storage
- desktop filesystem permissions
- backup key stored offline
People still pay for Sync.com because storage subscriptions sell confidence that files will still exist after a lost device, bad sync, or provider incident. The recurring cost buys chunking, encryption, conflict detection, versions, garbage collection, bandwidth, restore drills, monitoring, billing, and disaster recovery, not just the visible interface.
xzero-knowledge architecture, mature sync clients, sharing controls, and support
xglobal sync network
xbattle-tested conflict resolution
xransomware recovery guarantees
xmobile clients and support
How much does Sync.com cost?
- Monthly billing
- $16/mo$16/mo · per person
- Per year
- $192/yr$192/yr
- Annual billing
- $144/yr25% cheaper than paying monthly
- On a Brazilian card, with 3.5% IOF
- R$83.61/moR$753/yr
Saved to My list. You will see a notice on this site when the price changes.
You complete the purchase on Sync.com’s site. Vibe Radar does not handle payments.
| Plan | Monthly | Annual (per month) | What is included |
|---|---|---|---|
| free | $0/user | $0/user | 5 GB storage; up to 5 devices; 3 password-protected links; 3 shared folders; 30-day history. |
| personal 150 gb | $16/user≈ $16 | $12/user≈ $12 | 150 GB storage; unlimited transfer and sharing; 60-day history. |
| personal 1 tb | $16/user≈ $16 | $12/user≈ $12 | 1 TB storage; unlimited transfer and sharing; 90-day history. |
| pro solo 5 tb | $32/user≈ $32 | $28/user≈ $28 | 5 TB storage; unlimited transfer and sharing; 180-day history. |
Free tier5 GB storage, up to 5 devices, 3 password links, 3 shared folders and 30-day history
Billing termsmonthly + annual; promotional first-year prices revert to regular renewal prices; 30-day money-back window
Additional costsThe prominent 50% first-year discount on larger plans is temporary; renewal doubles to the regular price. Upgrades are prorated.
verified 2026-10-20 · source ↗
Is it cheaper to build or buy Sync.com?
Adjust the numbers: hours to build, your hourly rate, running costs and the subscription price.
Over 24 months, subscribing is cheaper.
Starting hours estimated from the analysis (closest consolation build: one sitting). Does not price what you give up (support, integrations, security).
Can I rebuild Sync.com?
Not really. Sync.com’s value is not the code: Recheck price before merge. See the honest breakdown above.
How much does Sync.com cost?
Sync.com costs about $16/mo (Personal 1TB, checked 10/20/2026), which is $144 per year.
What do I lose by replacing Sync.com?
Honestly: zero-knowledge architecture, mature sync clients, sharing controls, and support; global sync network; battle-tested conflict resolution; ransomware recovery guarantees; mobile clients and support. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Sync.com?
Yes: Nextcloud (Mature open-source file sync and collaboration server.). Using prior art is also vibecoding; the prompt is for when you want it exactly your way.